As you can see from the attached image, I have Windows 7 Home Premium 64 bit (OEM) , running from what was a buffalo external drive (now partitioned into Buffalo Mini (G) and New Windows (C) ), a WD Black (Drive O) which at the moment is formatted as NTFS, which I need to convert to GPT file table. A disk with Old Windows (E) ,( the OEM version that was originally on the PC) and a System Disk ( which I can only assume is the 100MB used by Windows) In short what I need to do is move the New Windows (C) to drive (O). But if I clone (C) to (O) using Acronis True Image from WD, the system will not boot , as when I try to boot it comes up with an error requesting GPT... I have a UEFI Bios (F1) .... PLEASE HELP !!!!